Trump's Oct. 20 order changes U.S. law to increase the number of pilots that can return for three-year duty to 1,000 from 25.

"We appreciate the flexibility, but we want pilots with more than just a three-year commitment," an Air Force spokesman said.

The spokesman also said the Air Force ideally wants a 10- to 20-year "flying commitment," while acknowledging the challenges of losing pilots to better paying, commercial jobs.

Ann Stefanek, the chief of Air Force media operations, said shortly after Trump's executive order was announced that the military branch didn't "currently intend to recall retired pilots." However, a full explanation was not immediately available.

The spokesman said Wednesday that the Air Force intends to close the pilot shortage through a three-part process that focuses on the retention of pilots, improvement of the training process and a review of the branch's policies to find the "most efficient ways" to use pilots.

The executive order amends an emergency declaration signed by President George W. Bush after the Sept. 11, 2001, terror attacks.

In August, Air Force Secretary Heather Wilson confirmed that the service was short 1,555 pilots of its requirements, including 1,211 fighter pilots.

At the time, Wilson announced the Air Force was increasing incentive pay to officers and enlisted crew members for the first time in 18 years.

Arizona Republican Sen. John McCain, chairman of the Senate Armed Services Committee and a former Navy pilot, this summer said the pilot shortage has reached "crisis" stage. His Capitol Hill office on Wednesday did not immediately return a call seeking comment of the Air Force's explanation.

Fox News' Joseph Weber and Lucas Tomlinson and The Associated Press contributed to this report.